2008/6/7 <[EMAIL PROTECTED]>:
> Hi Guys, sorry for the uninformative title.
>
> Basically If folk remember I am wanting to do some PLS regression on some
> data. Folk on this list were kind enough to point me in the direction of
> how to do this and I seem to have hit a really simple error which has
> gorund me to a halt. So any chance of a shove in the right direction
> basically
>
> plsr takes ("response ~ data") as formula I have data imported as a
> dataframe, this was imporrted from CSV with no header so my column names
> are V1 to V83
>
> I can force a PLSR by doing ("V83 ~ V1+V2+v3.....+v82") but i would rather
> have this in the form of ("response ~ data") (because i'm going to do some
> PLR predictions on generated data sets later)
>
> So I want to name V83 responseACC and V1:V82 dataACC so that my plsr
> equation can be ("responseACC ~ dataACC")
That does not quite work this way in R, I think. This is becoming more
a R question,
so r-help is probably a better place (although I could already hint
you that studying the
example for "plsr" should be helpful ;-) ).
> I have tried various solutions to this the closest I get is listed below
> but for some reason it doesn't want to do what I think it should do.
>
> when I print r.names I get V83 called err V83 and dataACC called
> dataACC.V1....dataACC.V82 which is really confusing; and probably where
> the fault lies.
>
> Can I do this?
>
> If I can't do this then, I tried doing...
> r.names(accFASdf) = r.c(
> "V1","V2","V3","V4","V5","V6","V7","V8","V9","V10","V11","V12","","V13","V14","V15","V16","V17","V18","V19","V20","V21","V22","V23","V24","","V25","V26","V27","V28","V29","V30","V31","V32","V33","V34","V35","V36","","V37","V38","V39","V40","V41","V42","V43","V44","V45","V46","V47","V48","","V49","V50","V51","V52","V53","V54","V55","V56","V57","V58","V59","V60","","V61","V62","V63","V64","V65","V66","V67","V68","V69","V70","V71","V72","","V73","V74","V75","V76","V77","V78","V79","V80","V81","V82"
> )
>
> to name the column names of my generated dataframe accFASdf the same as I
> get on import of my training set but that gives me the error
>
> SyntaxError: can't assign to function call
>
> Thanks in advance for any help
>
> Chris
>
> import rpy
> from rpy import *
>
> from UserString import MutableString
>
>
>
> r.library('pls')
> # need to change the conversion mode here so mod keeps it's R-nature:
> rpy.set_default_mode(rpy.NO_CONVERSION)
>
> dataPLS1=r.read_csv('acc-with-values.csv', header = 0, sep = ',',
> quote='\"', dec=".", fill = 1)
>
>
> dataPLS = r.as_data_frame({'dataACC': dataPLS1[1:81],'responseACC':
> dataPLS1[82]})
> r.print_(r.names(dataPLS))
>
>
>
> mod=r.plsr(r("responseACC ~ dataACC"),ncomp=10,data=dataPLS,validation="CV")
>
> Error: responseACC not found
>
>
> mod=r.plsr(r("V83 ~ dataACC"),ncomp=10,data=dataPLS,validation="CV")
>
> Error: dataACC not found
>
>
>
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